Range-extending generation system based on rotor engine

The invention provides a range-extending generation system based on a rotor engine. The range-extending generation system comprises the rotor engine, an electric generator and an ECU (electronic control unit), wherein the rotor engine comprises a cylinder body, a combustion chamber and a wankel rotor; the wankel rotor rotating around an eccentric shaft is arranged in the cylinder body; the eccentric shaft is connected with the electric generator through an elastic coupling; the combustion chamber is located between the cylinder body and the wankel rotor; a gas inlet channel communicated with the combustion chamber is formed in the cylinder body; a gas outlet channel communicated with the combustion chamber is formed in the cylinder body, and the gas inlet channel and the gas outlet channel are not located in the same combustion space; an igniter is fixed in the combustion chamber; a snifting valve is arranged on the gas inlet channel, and an exhaust valve is arranged on the gas outlet channel; the ECU is conn